Table IV.
Results of the Bacteriological Examination of the Fokfulum Water Supply for the year 1915.
Date. Sample. Rate of Filtration. Total Colonies on Agar in 1 cc MacConkey's Lactose Neutral Red Bile Salt Peptone Water. Presence of the Coli Group. 1 cc. 2 cc. 5 cc. 10 cc. 20 cc. 50 cc. 4-1-15. Unfiltered, 85 + Groups I and IV in 50 cc. Negative up to 5 cc. 4-1-15. Filtered, 500 30 - - - - - - Negative in 2 cc. 6-1-15. Unfiltered, 70 + Group IV in 10 cc. Negative in 50 cc. 6-1-15. Filtered, 450 60 + - - - - - Group IV in 2 cc. Negative up to 50 cc. 8-1-15. Unfiltered, 60 + Group IV in 1 cc. Negative up to 50 cc. 8-1-15. Filtered, 500 25 - - - - - - Negative in 50 cc. 12-4-15. Unfiltered, 75 + Group I and II in 1 cc. Negative up to 50 cc. 12-4-15. Filtered, 500 5 - - - - - - Negative in 50 cc. 14-4-15. Unfiltered, 80 + Group I in 1 cc. 14-4-15. Filtered, 325 2 - - - - - - Negative in 50 cc. 16-4-15. Unfiltered, 80 + I in 50 cc. 16-4-15. Filtered, 325 10 - - - - - - Negative in 50 cc. 5-7-15. Unfiltered, 100 + IV in 10 cc. 5-7-15. Filtered, 650 30 + - - - - - I in 50 cc. 7-7-15. Unfiltered, 90 + Groups I and IV in 1 cc. Negative up to 50 cc. 7-7-15. Filtered, 650 20 + - - - - - Negative in 50 cc. 9-7-15. Unfiltered, 70 + Groups II and I in 1 cc. Negative in 50 cc. 9-7-15. Filtered, 700 10 - - - - - - Negative in 50 cc. 4-10-15. Unfiltered, 70 + Group III in 1 cc. Negative up to 50 cc. 4-10-15. Filtered, 400 5 - - - - - - Negative in 50 cc. 6-10-15. Unfiltered, 65 + 6-10-15. Filtered, 400 15 + - - - - - 8-10-15. Unfiltered, 50 + 8-10-15. Filtered, 400 10 + - - - - -All samples taken either immediately before or immediately after filtration. The rate of filtration is given by the Water Authority in gallons per square yard per day. Classification of the Coli Group is that of MacConkey,
Acid and Gas; 1 = Acid only;
+ = No change.
M 81
Table IV.
Results of the Bacteriological Examination of the Fokfulum Water Supply for the year 1915.
Rate Total Colo-
nies on
MacConkey's Lactose Neutral Red Bile
Salt Peptone Water.
of
Sample.
Date.
Agar in 1 cc
Filtra-at 37° C. for
tion.
24 hours. To ce.
1 cc.
2 cc.
5 cc.
10 cc. | 20 cc. | 50 cc.
Unfiltered,
4-1-15.
85
+
Filtered,
...
4-1-15.
500
30
Unfiltered,
6-1-15.
70
Filtered,
6-1-15. 450
60
Unfiltered,
8-1-15.
60
Filtered,
8-1-15. 500
25
Unfiltered,
12-4-15.
75
Filtered,
12-4-15. 500
5
Unfiltered,
14-4-15.
80
Filtered,
14-4-15. 325
2
Unfiltered,
16-4-15.
80
Filtered,
16-4-15. 325
10
Unfiltered,
5-7-15.
100
Filtered,
5-7-15. 650
30
Unfiltered,
7-7-15.
90
Filtered,
7-7-15. 650
20
Unfiltered,
9-7-15.
70
Filtered,
9-7-15. 700
10
Unfiltered,
4-10-15.
70
Filtered,
4-10-15. 400
5
Unfiltered,
6-10-15,
65
Filtered,
6-10-15. 400
15
Unfiltered, 8-10-15.
50
Filtered,
8-10-15. 400
10
( + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1
[+1 +1 +1 + ||
+1+++ 1 + 1 + 1 + 1 + 1 + 1 + ! + | + | + |
+ 1 + !+ !+ | + | + | + | + | + | + |+|+|
1 + 1 + 1 + 1 + ! + 1 + 1 + 1 + 1 + 1 +++ 1 +
| +++ 1 + 1 +++++ 1 + 1 + 1+++++++
Presence of the Coli Group.
Negative in 2 cc.
Groups I and IV in 50 ec. Negative up to 5 cc.
Groups I and IV in 10 cc.
Group JV in 10 ec. Negative in 50 cc. Group IV in 2 ce. Negative up to 50 cc..
Group IV in I cc. Negative up to 50 ce. Group I and II in cc. Negative up to 50 cc.
Group I in 1 cc.
I in 50 cc.
">
IV in to cc.
I in 50 cc.
Groups I and IV in Negative up to 50 cc. Groups I and II in 1 cc. Negative up to 50 cc.
Groups II and I in lec. Negative in 50 cc.
Group III in 1 cc. Negative up to 50 cc.
cc.
All samples taken either immediately before or immediately after filtration. The rate of filtration is given by the Water Authority in gallons per square yard per day. Classification of the Coli Group is that of MacConkey,
Acid and Gas; 1= Acid only;
+
No change.
M 81
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